Mastonia peasi Jousseaume, 1884 Mastonia peasi Jousseaume, 1884: 222. Triforis peasei (Jousseaume, 1884) — Tryon 1887: 191. Triphora peasei (Jousseaume, 1884) — Kay 1979: 148, fig. 47a–b, 52c. Triphora peasi (Jousseaume, 1884) — Hemmes & Goldsmith 1986: 4. Type locality. “ Sandwich Islands ” (Hawaii). Type material. NHMUK 1962808, holotype. Distribution. Hawaii (Pease 1861; Paetel 1888; Kay 1965; Kay 1979; Hemmes & Goldsmith 1986; Johnson 1994; Hemmes et al. 1996e; Severns 2011; Albano et al. 2019). Remarks. Triphoris affinis Pease, 1861 is preoccupied by Triphora affinis Hinds, 1843, thus Jousseaume (1884) introduced Mastonia peasi as a nomen novum. (†) Triphoris pedroana Bartsch, 1907 Triphoris pedroanus Bartsch, 1907b: 250, pl. 16, fig. 1. Triphora pedroana Bartsch, 1907 — Jordan 1926: 246. Type locality. United States, California, San Pedro. Type material. USNM 155206, syntypes. Distribution. Mexico (Jordan 1926; Abbott 1974), United States, California (Bartsch 1907b; Abbott 1954; Kanakoff & Emerson 1959; McLean 1969; Abbott 1974). Geological age. Pleistocene (Kanakoff & Emerson 1959). Remarks. The genus Triphoris is of feminine gender, the name should thus be Triphoris pedroana.

Published as part of Bakker, Piet A. J. & Albano, Paolo G., 2022, Nomenclator, geographic and stratigraphic distribution of the family Triphoridae (Mollusca: Gastropoda), pp. 1-216 in Zootaxa 5088 (1) on page 134, DOI: 10.11646/zootaxa.5088.1.1, http://zenodo.org/record/5836536